semilunar valve

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Prior to surgery, MRI showed injury to ACL and semilunar valve in all patients.
所有患者术前MRI均显示前交叉韧带损伤并发半月板损伤；
The pulmonary valve (also called the pulmonary semilunar valve) lies at the base of the pulmonary trunk, where it prevents the backflow of ejected blood into the right ventricle.
这些结构可以防止心室瓣的外翻,就像一把强风中雨伞,当心室收缩的时候心室的压力就会增加。
semilunar valve of pulmonary artery
肺动脉半月瓣
posterior cusp of semilunar valves
半月瓣后尖瓣
semilunar valves of pulmonary artery
肺动脉半月瓣

one of the valves (= structures that open and close) that stop blood from returning into the ventricles (= lower spaces) of the heart

either of two crescent-shaped valves, one in the aorta and one in the pulmonary artery, that prevent regurgitation of blood into the heart